High-voltage interlocking detection device, electric energy distribution unit, vehicle control unit and vehicle

Abstract

The utility model provides a high-voltage interlocking detection device, an electric energy distribution unit, a whole vehicle control unit and a vehicle. In the high-voltage interlocking detection device, the controller enables the two voltage detection circuits to perform voltage detection normally, so that the two voltage detection circuits can output detection results to the controller; if the potential of the acquisition end of at least one voltage detection circuit is not equal to zero, it is indicated that one side is performing high-voltage interlocking detection on the high-voltage connector; when the two voltage detection circuits perform voltage detection normally, the controller enables the high-voltage interlocking detection circuit to forbid high-voltage interlocking detection, so that it is indicated that the high-voltage interlocking detection is performed on the high-voltage connector on the outer side under the condition. And under the condition, the controller enables the high-voltage interlocking detection circuit to forbid high-voltage interlocking detection, so that high-voltage interlocking detection on the high-voltage connector by the inner side and the outer side at the same time can be avoided, and the possibility that a detection result of high-voltage interlocking detection is disordered is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage detection, in particular to a high-voltage interlock detection device, an electric energy distribution unit, a whole vehicle control unit and a vehicle. Background Art

[0002] like Figure 1 As shown, the high-voltage connector includes a high-voltage plug 01 and a high-voltage socket 05. If the high-voltage plug 01 is plugged in with the high-voltage socket 05, the two are interlocked successfully, that is, the high-voltage interlock is successful. If the high-voltage plug 01 is separated from the high-voltage socket 05, the two are interlocked failed, that is, the high-voltage interlock fails. It can be seen that the high-voltage interlock detection is to detect whether the high-voltage plug 01 and the high-voltage socket 05 are plugged in or not.

[0003] Depend on Figure 1 It can be seen that on the high-voltage plug 01, the length of its interlocking terminal 04 is smaller than the length of its positive terminal 02 and its negative terminal 03. Therefore, in the process of separating the high-voltage plug 01 from the high-voltage socket 05, the interlocking terminal 04 on the high-voltage plug 01 is disconnected from the corresponding terminal on the high-voltage socket 05 before the positive terminal 02 and the negative terminal 03. In the process of plugging the high-voltage plug 01 into the high-voltage socket 05, the interlocking terminal 04 on the high-voltage plug 01 is plugged into the corresponding terminal on the high-voltage socket 05 later than the positive terminal 02 and the negative terminal 03. Then, by detecting whether the interlocking terminal 04 on the high-voltage plug 01 is plugged into the corresponding terminal on the high-voltage socket 05, it is possible to detect whether the high-voltage plug 01 is plugged into the high-voltage socket 05, that is, to realize high-voltage interlock detection.

[0004] Currently, high-voltage interlock detection is performed on both the PDU (Power Distribution Unit) and the VCU (Vehicle Control Unit). However, if high-voltage interlock detection is performed on both sides simultaneously, the results of the high-voltage interlock detection may be disordered, that is, the high-voltage interlock detection may be erroneous.

[0005] Therefore, how to reduce the possibility of disorder in the detection results of high-voltage interlock detection is a technical problem that needs to be solved urgently. Utility Model Content

[0006] In view of this, the present invention provides a high-voltage interlock detection device, a power distribution unit, a vehicle control unit and a vehicle to detect whether other sides are performing high-voltage interlock detection.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A first aspect of the present application provides a high-voltage interlock detection device, comprising: a high-voltage interlock detection circuit and two voltage detection circuits; wherein:

[0009] The two detection ends of the high-voltage interlock detection circuit serve as the two detection ends of the high-voltage interlock detection device, and are respectively connected to the two ends of the interlock terminal in the high-voltage connector;

[0010] The two acquisition terminals of the voltage detection circuit are respectively connected to the two detection terminals of the high-voltage interlock detection circuit;

[0011] The controller outputs a first detection signal to the high-voltage interlock detection circuit and a second detection signal to both of the voltage detection circuits; the first detection signal is a signal that prohibits the high-voltage interlock detection circuit from performing high-voltage interlock detection, and each second detection signal is a signal that enables the voltage detection circuit receiving the signal to perform voltage detection normally;

[0012] At least one of the voltage detection circuits outputs a target detection result to the controller, and the controller outputs the first detection signal to the high-voltage interlock detection circuit; each of the target detection results indicates that the potential of the acquisition end of the voltage detection circuit outputting itself is not equal to zero.

[0013] Optionally, the voltage detection circuit includes: a first controllable switch and at least two first voltage dividing branches; wherein:

[0014] The first controllable switch and all the first voltage-dividing branches are connected in series, one end of the series branch is connected to: the detection end corresponding to the voltage detection circuit on the high-voltage interlock detection circuit, and the other end of the series branch is grounded;

[0015] The connection point of any two of the first voltage-dividing branches serves as the output end of the voltage detection circuit;

[0016] The control end of the first controllable switch serves as the control end of the voltage detection circuit.

[0017] Optionally, the voltage detection circuit further includes: a second controllable switch; wherein:

[0018] One end of the second controllable switch is connected to: a detection end on the high-voltage interlock detection circuit corresponding to the voltage detection circuit, and the other end of the second controllable switch is connected to the output end of the first power supply;

[0019] The control end of the second controllable switch is connected to the output end corresponding to the controller.

[0020] Optionally, the voltage detection circuit further includes: at least one second voltage dividing branch; wherein:

[0021] All the second voltage-dividing branches and the branch formed by the second controllable switch are connected in series, and one end of the formed series branch is connected to: the detection end corresponding to the voltage detection circuit on the high-voltage interlock detection circuit, and the other end of the formed series branch is connected to the output end of the first power supply.

[0022] Optionally, the high-voltage interlock detection circuit includes: at least one third controllable switch and at least one third voltage dividing branch; wherein:

[0023] All of the third controllable switches and all of the third voltage dividing branches are connected in series on a path between any detection terminal of the high-voltage interlock detection circuit and any pole of the second power supply;

[0024] The target end of any one of the third voltage-dividing branches serves as the output end of the high-voltage interlock detection circuit;

[0025] The target end is an end of the third voltage dividing branch that is directly or indirectly connected to the detection end of the high-voltage interlock detection circuit;

[0026] The control end of each of the third controllable switches is connected to the output end corresponding to the third controllable switch on the controller.

[0027] Optionally, the high-voltage interlock detection circuit further includes: at least one anti-reverse branch; wherein:

[0028] At least one anti-reverse branch is connected in series on a path between a detection terminal of the high-voltage interlock detection circuit and the positive electrode of the second power supply;

[0029] and / or,

[0030] At least one anti-reverse branch is connected in series on a path between the other detection terminal of the high-voltage interlock detection circuit and the negative electrode of the second power supply;

[0031] The conduction direction of each anti-reverse branch is the same as the current direction allowed on the path where the branch is located.

[0032] Optionally, the anti-reverse branch is a diode branch.

[0033] Optionally, the high-voltage interlock detection circuit includes: at least one third controllable switch and at least one third voltage dividing branch; wherein:

[0034] At least one third voltage dividing branch and / or at least one third controllable switch are connected in series on a path between a detection terminal of the high-voltage interlock detection circuit and the positive electrode of the second power supply;

[0035] At least one third voltage dividing branch and / or at least one third controllable switch are connected in series on a path between the other detection terminal of the high-voltage interlock detection circuit and the negative electrode of the second power supply;

[0036] The target end of any one of the third voltage-dividing branches serves as the output end of the high-voltage interlock detection circuit;

[0037] The target end is an end of the third voltage dividing branch that is directly or indirectly connected to the detection end of the high-voltage interlock detection circuit;

[0038] The control end of each of the third controllable switches is connected to the output end corresponding to the third controllable switch on the controller.

[0039] A second aspect of the present application provides an electric energy distribution unit, comprising: a first controller and a high-voltage interlock detection device as described in any one of the first aspects of the present application.

[0040] A third aspect of the present application provides a vehicle control unit, comprising: a second controller and a high-voltage interlock detection device as described in any one of the first aspects of the present application.

[0041] The fourth aspect of the present application provides a vehicle, comprising: the power distribution unit as described in the second aspect of the present application, and / or the vehicle control unit as described in the third aspect of the present application.

[0042] As can be seen from the above technical solution, the utility model provides a high-voltage interlock detection device. In the high-voltage interlock detection device, since the controller enables both voltage detection circuits to perform voltage detection normally, both voltage detection circuits can output detection results to the controller; if at least one voltage detection circuit outputs a target detection result to the controller, that is, the potential of the acquisition end of at least one voltage detection circuit is not equal to zero, it indicates that one side is performing high-voltage interlock detection on the high-voltage connector; and since the controller disables the high-voltage interlock detection circuit from performing high-voltage interlock detection while both voltage detection circuits are performing voltage detection normally, that is, in this case, the high-voltage interlock detection circuit does not perform high-voltage interlock detection, it indicates that in this case, the outside is performing high-voltage interlock detection on the high-voltage connector, and in this case, the controller disables the high-voltage interlock detection circuit from performing high-voltage interlock detection, thereby avoiding the inside and outside from performing high-voltage interlock detection on the high-voltage connector at the same time, thereby reducing the possibility of disorder in the detection results of the high-voltage interlock detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0044] Figure 1 It is a structural diagram of a high-voltage connector in the prior art;

[0045] Figure 2 A schematic structural diagram of an implementation scheme of a high-voltage interlock detection device provided in one embodiment of the present application;

[0046] Figure 3 A schematic structural diagram of another implementation of a high-voltage interlock detection device provided in one embodiment of the present application;

[0047] Figure 4 A schematic structural diagram of another embodiment of the high-voltage interlock detection device provided in one embodiment of the present application;

[0048] Figure 5 A schematic structural diagram of another embodiment of the high-voltage interlock detection device provided in one embodiment of the present application;

[0049] Figure 6 A schematic structural diagram of another embodiment of the high-voltage interlock detection device provided in one embodiment of the present application;

[0050] Figure 7 A schematic structural diagram of another implementation of a high-voltage interlock detection device provided in one embodiment of the present application;

[0051] Figure 8 A schematic structural diagram of another embodiment of the high-voltage interlock detection device provided in one embodiment of the present application;

[0052] Figure 9 A schematic structural diagram of an implementation scheme of an electric energy distribution unit provided in an embodiment of the present application;

[0053] Figure 10 A schematic structural diagram of an implementation scheme of a vehicle control unit provided in an embodiment of the present application;

[0054] Figure 11 A schematic structural diagram of an implementation scheme of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0056] In this application, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0057] In order to detect whether there is a high voltage interlock detection on the other side, another embodiment of the present application provides a high voltage interlock detection device, the specific structure of which can be seen in Figure 2 100 specifically includes: a high-voltage interlock detection circuit 10 and two voltage detection circuits 20.

[0058] The two detection terminals of the high-voltage interlock detection circuit 10 serve as the two detection terminals of the high-voltage interlock detection device 100 and are respectively connected to the two ends of the interlock terminal in the high-voltage connector 300 .

[0059] The collection ends of the two voltage detection circuits 20 are respectively connected to the two detection ends of the high-voltage interlock detection circuit 10. For example, the collection end of the upper voltage detection circuit 20 is connected to the detection end A of the high-voltage interlock detection circuit 10, and the collection end of the lower voltage detection circuit 20 is connected to the detection end B of the high-voltage interlock detection circuit 10.

[0060] The output end of the high-voltage interlock detection circuit 10 and the output ends of the two voltage detection circuits 20 are connected to the three receiving ends of the controller 200 respectively.

[0061] The control end of the high-voltage interlock detection circuit 10 and the control ends of the two voltage detection circuits 20 are connected to the three output ends of the controller 200 respectively.

[0062] The working process of the high-voltage interlock detection device 100 is specifically described as follows:

[0063] The controller 200 outputs a first detection signal to the high-voltage interlock detection circuit 10 and outputs a second detection signal to the two voltage detection circuits 20 .

[0064] The first detection signal is a signal that prohibits the high-voltage interlock detection circuit 10 from performing high-voltage interlock detection, and each second detection signal is a signal that enables the voltage detection circuit 20 receiving the second detection signal to perform voltage detection normally.

[0065] In other words, the controller 200 controls the high-voltage interlock detection circuit 10 to prohibit high-voltage interlock detection, and controls the two voltage detection circuits 20 to perform voltage detection normally; as for how to perform high-voltage interlock detection and voltage detection, it will be explained in detail below and will not be repeated here.

[0066] When the high-voltage interlock detection circuit 10 prohibits high-voltage interlock detection and the two voltage detection circuits 20 perform voltage detection normally, if at least one voltage detection circuit 20 outputs the target detection result to the controller 200, the controller 200 outputs the above-mentioned first detection signal to the high-voltage interlock detection circuit 10.

[0067] Each target detection result represents that the potential of the collection terminal of the voltage detection circuit 20 outputting the target detection result itself is not equal to zero.

[0068] In other words, when the high-voltage interlock detection circuit 10 prohibits high-voltage interlock detection and the two voltage detection circuits 20 perform voltage detection normally, if the potential of the collection end of at least one voltage detection circuit 20 is not equal to zero, the controller 200 controls the high-voltage interlock detection circuit 10 to prohibit high-voltage interlock detection.

[0069] Typically, if at least one voltage detection circuit 20 outputs a target detection result to the controller 200 , the controller 200 outputs a third detection signal to both voltage detection circuits 20 in addition to the first detection signal to the high-voltage interlock detection circuit 10 .

[0070] Each third detection signal is a signal that prohibits the voltage detection circuit 20 receiving the third detection signal from performing voltage detection.

[0071] In other words, if the potential of the collection end of at least one voltage detection circuit 20 is not equal to zero, the controller 200 not only controls the high-voltage interlock detection circuit 10 to prohibit high-voltage interlock detection, but also controls the two voltage detection circuits 20 to prohibit voltage detection.

[0072] When the high-voltage interlock detection circuit 10 prohibits high-voltage interlock detection and the two voltage detection circuits 20 perform voltage detection normally, if both voltage detection circuits 20 do not output the target detection result to the controller 200, the controller 200 outputs a fourth detection signal to the high-voltage interlock detection circuit 10.

[0073] The fourth detection signal is a signal that enables the high-voltage interlock detection circuit 10 to perform high-voltage interlock detection normally.

[0074] In other words, when the high-voltage interlock detection circuit 10 is prohibited from performing high-voltage interlock detection and the two voltage detection circuits 20 perform voltage detection normally, if the potentials of the acquisition ends of the two voltage detection circuits 20 are both equal to zero, the controller 200 controls the high-voltage interlock detection circuit 10 to perform high-voltage interlock detection normally.

[0075] Typically, if neither of the two voltage detection circuits 20 outputs the target detection result to the controller 200 , the controller 200 outputs the third detection signal to both of the two voltage detection circuits 20 in addition to outputting the fourth detection signal to the high-voltage interlock detection circuit 10 .

[0076] In other words, if the potentials of the acquisition terminals of the two voltage detection circuits 20 are both zero, the controller 200 not only controls the high-voltage interlock detection circuit 10 to perform high-voltage interlock detection normally, but also controls the two voltage detection circuits 20 to prohibit voltage detection.

[0077] In the high-voltage interlock detection device 100, since the controller 200 enables both voltage detection circuits 20 to perform voltage detection normally, both voltage detection circuits 20 can output detection results to the controller 200; if at least one voltage detection circuit 20 outputs a target detection result to the controller 200, that is, the potential of the acquisition end of at least one voltage detection circuit 20 is not equal to zero, it indicates that one side is performing high-voltage interlock detection on the high-voltage connector 300; and since the controller 200 disables the high-voltage interlock detection circuit 10 from performing high-voltage interlock detection while both voltage detection circuits 20 are performing voltage detection normally, that is, in this case the high-voltage interlock detection circuit 10 does not perform high-voltage interlock detection, it indicates that in this case the outside is performing high-voltage interlock detection on the high-voltage connector 300, and in this case the controller 200 disables the high-voltage interlock detection circuit 10 from performing high-voltage interlock detection, so it can avoid the inside and outside from performing high-voltage interlock detection on the high-voltage connector 300 at the same time, thereby reducing the possibility of disorder in the detection results of the high-voltage interlock detection.

[0078] In addition, in the prior art, when high-voltage interlock detection is required on the outside, the collection end of the high-voltage interlock detection device 100 and the two ends led out of the interlock terminal in the high-voltage connector 300 are not welded together. When high-voltage interlock detection is not required on the other side but the high-voltage interlock detection device 100 needs to perform high-voltage interlock detection, the collection end of the high-voltage interlock detection device 100 and the two ends led out of the interlock terminal in the high-voltage connector 300 are welded together. Therefore, there are many hardware versions for different customer needs of different projects. The high-voltage interlock detection device 100 provided in this application can control whether it performs high-voltage interlock detection through software, thereby reducing the maintenance of hardware versions.

[0079] Another embodiment of the present application provides a specific implementation of the voltage detection circuit 20. Each voltage detection circuit 20 can adopt this implementation. The specific structure of this implementation can be found in Figure 3 20 in the embodiment specifically includes: a first controllable switch 22 and at least two first voltage dividing branches 21.

[0080] The first controllable switch 22 and all the first voltage-dividing branches 21 are connected in series. One end of the series branch formed serves as the collection end of the voltage detection circuit 20 and is connected to the detection end corresponding to the voltage detection circuit 20 on the high-voltage interlock detection circuit 10. The other end of the series branch formed is grounded GND.

[0081] For example, Figure 3 Taking the voltage detection circuit 20 located at the top as an example, it includes two first voltage-dividing branches 21, the first controllable switch 22 and the two first voltage-dividing branches 21 are connected in series, and one end of the series branch formed is connected to: the detection end A of the high-voltage interlock detection circuit 10, and the other end of the series branch formed is grounded GND.

[0082] The first voltage divider circuit 21 includes at least one resistor. If the number of resistors is greater than 1, all resistors are connected in series, and the two ends of the series branch formed serve as the two ends of the first voltage divider circuit 21; if the number of resistors is equal to 1, the two ends of the resistor serve as the two ends of the first voltage divider circuit 21. For example, Figure 3 As shown in R1.

[0083] In addition, the first controllable switch 22 includes at least one switching tube. If the number of switching tubes is greater than 1, all the switching tubes are connected in series, and the two ends of the formed series branch serve as the two ends of the first controllable switch 22 respectively. The control ends of all the switching tubes are connected, and the connection point serves as the control end of the first controllable switch 22; if the number of switching tubes is equal to 1, the two ends of the switching tube serve as the two ends of the first controllable switch 22 respectively, and the control end of the switching tube serves as the control end of the first controllable switch 22.

[0084] Optionally, the switch tube can be a MOS tube or an IGBT. In practical applications, including but not limited to these, no specific limitation is made here and it can be determined according to the specific circumstances, all of which are within the scope of protection of this application.

[0085] The connection point of any two first voltage dividing branches 21 is used as the output end of the voltage detection circuit 20 and is connected to the corresponding receiving end of the controller 200. For example, Figure 3 Taking the voltage detection circuit 20 located at the upper side as an example, the connection point of the two first voltage dividing branches 21 serves as the output end of the voltage detection circuit 20 and is connected to the corresponding receiving end of the controller 200.

[0086] The control end of the first controllable switch 22 serves as the control end of the voltage detection circuit 20 , that is, when the voltage detection circuit 20 receives the second detection signal or the third detection signal, the first controllable switch 22 receives the second detection signal or the third detection signal.

[0087] It should be noted that if the first controllable switch 22 includes multiple switch tubes, when the first controllable switch 22 receives the second detection signal or the third detection signal, the control terminals of all the switch tubes receive the second detection signal or the third detection signal.

[0088] The working principle of the voltage detection circuit 20 is as follows:

[0089] When the voltage detection circuit 20 receives the second detection signal, that is, when the first controllable switch 22 also receives the second detection signal, the first controllable switch 22 is turned on.

[0090] When the first controllable switch 22 is turned on, if the potential of the acquisition end of the voltage detection circuit 20 is not equal to zero, that is, the potential of one end of the series branch formed by all the first voltage-dividing branches 21 and the first controllable switch 22 is not equal to zero and the potential of the other end is approximately equal to zero, then the series branch formed by all the first voltage-dividing branches 21 and the first controllable switch 22 is in a conductive state, so that the potential of the output end of the voltage detection circuit 20 is not equal to zero.

[0091] When the first controllable switch 22 is turned on, if the potential of the acquisition end of the voltage detection circuit 20 is approximately equal to zero, that is, the potentials at both ends of the series branch formed by all the first voltage-dividing branches 21 and the first controllable switch 22 are approximately equal to zero, then the series branch formed by all the first voltage-dividing branches 21 and the first controllable switch 22 is in an open-circuit state, so that the potential of the output end of the voltage detection circuit 20 is approximately equal to zero.

[0092] It can be seen from this that the potential of the output end of the voltage detection circuit 20 is not equal to zero, indicating that the potential of the collection end of the voltage detection circuit 20 is not equal to zero; the potential of the output end of the voltage detection circuit 20 is approximately equal to zero, indicating that the potential of the collection end of the voltage detection circuit 20 is equal to zero.

[0093] This embodiment also provides another specific implementation of the voltage detection circuit 20, and each voltage detection circuit 20 can adopt this implementation; the specific structure of this implementation can be found in Figure 4 In 20 , this embodiment, based on the above embodiment, further includes: a second controllable switch 23 .

[0094] One end of the second controllable switch 23 is connected to the detection end of the high-voltage interlock detection circuit 10 corresponding to the voltage detection circuit 20 , and the other end of all the second controllable switches 23 is connected to the output end of the first power supply 24 .

[0095] For example, Figure 4 Taking the voltage detection circuit 20 located at the top as an example, it also includes a second controllable switch 23, one end of the second controllable switch 23 is connected to: the detection end A of the high-voltage interlock detection circuit 10, and the other end of the second controllable switch 23 is connected to the output end of the first power supply 24.

[0096] The control end of the second controllable switch 23 is connected to the corresponding output end of the controller 200. To simplify the diagram, the connection relationship between the control end of the second controllable switch 23 and the output end of the controller 200 is not shown in subsequent figures.

[0097] The second controllable switch 23 includes at least one switching tube. If the number of switching tubes is greater than 1, all the switching tubes are connected in series, and the two ends of the formed series branch serve as the two ends of the second controllable switch 23 respectively. The control ends of all the switching tubes are connected, and the connection point serves as the control end of the second controllable switch 23; if the number of switching tubes is equal to 1, the two ends of the switching tube serve as the two ends of the second controllable switch 23 respectively, and the control end of the switching tube serves as the control end of the second controllable switch 23.

[0098] Optionally, the switch tube can be a MOS tube or an IGBT. In practical applications, including but not limited to these, no specific limitation is made here and it can be determined according to the specific circumstances, all of which are within the scope of protection of this application.

[0099] Before the controller 200 outputs the fourth detection signal to the high-voltage interlock detection circuit 10 and the third detection signal to the two voltage detection circuits 20, the controller 200 outputs a conduction signal to the second controllable switch 23. In other words, before the controller 200 controls the high-voltage interlock detection circuit 10 to perform high-voltage interlock detection normally and controls the two voltage detection circuits 20 to prohibit voltage detection, the controller 200 controls the second controllable switch 23 to turn on.

[0100] When the second controllable switch 23 is turned on, if the voltage detection circuit 20 does not fail, the potential of the output end of the voltage detection circuit 20 is approximately equal to the preset potential; if the voltage detection circuit 20 is short-circuited to ground, that is, the ungrounded end of a certain voltage-dividing branch is directly grounded for some reason, the potential of the output end of the voltage detection circuit 20 is less than the preset potential; if the voltage detection circuit 20 is short-circuited to the first power supply 24, that is, the end of a certain first voltage-dividing branch 21 that is not connected to the first power supply 24 is directly connected to the output end of the first power supply 24 for some reason, the potential of the output end of the voltage detection circuit 20 is greater than the preset potential.

[0101] The preset potential is a theoretical value of the potential at the output end of the voltage detection circuit 20 when the voltage detection circuit 20 is not faulty. In practical applications, the preset potential depends on the actual structure of the voltage detection circuit 20 .

[0102] For example, Figure 4 For example, the preset potential = the output voltage of the first power supply 24 × R1 ÷ (R1 + R1) = the output voltage of the first power supply 24 ÷ 2, that is, the preset potential is equal to half of the output voltage of the first power supply 24 .

[0103] In addition, in actual applications, if the potential of the output end of the voltage detection circuit 20 is within the first preset range of the preset potential, it is considered that the potential of the output end of the voltage detection circuit 20 is approximately equal to the preset potential; if the potential of the output end of the voltage detection circuit 20 exceeds the first preset range of the preset potential, it is considered that the potential of the output end of the voltage detection circuit 20 is less than the preset potential or greater than the preset potential; in actual applications, the first preset range is set according to actual conditions and is not specifically limited here; for example, if the potential of the output end of the voltage detection circuit 20 is within ±1V of the preset potential, it is considered that the potential of the output end of the voltage detection circuit 20 is approximately equal to the preset potential.

[0104] It can be seen from this that if the potential of the output end of the voltage detection circuit 20 is approximately equal to the preset potential, the controller 200 determines that the voltage detection circuit 20 has not failed; if the potential of the output end of the voltage detection circuit 20 is less than the preset potential, the controller 200 determines that the voltage detection circuit 20 has a short-circuit fault to ground; if the potential of the output end of the voltage detection circuit 20 is greater than the preset potential, the controller 200 determines that the cluster voltage detection circuit 20 has a short-circuit fault to the first power supply 24.

[0105] In addition, Figure 4 Taking 20 in FIG. 1 as an example, when the second controllable switch 23 is turned on, if a short circuit to ground occurs in the voltage detection circuit 20, that is, the ungrounded end of a certain voltage divider branch is directly grounded for some reason, then the potential of the output end of the voltage detection circuit 20 is not only less than the preset potential, but also approximately equal to zero.

[0106] It can be seen from this that if the structure of the voltage detection circuit 20 is as follows Figure 4 As shown in 20, that is, there is only one first voltage dividing branch 21 provided between the detection end corresponding to the voltage detection circuit 20 and the ground on the high-voltage interlock detection circuit 10. If the potential of the output end of the voltage detection circuit 20 is approximately equal to zero, the controller 200 determines that a short circuit fault to the ground occurs in the voltage detection circuit 20.

[0107] It should be noted that if the potential of the output end of the voltage detection circuit 20 is within a second preset range of zero, the potential of the output end of the voltage detection circuit 20 is considered to be approximately equal to zero; in actual applications, the second preset range is set according to actual conditions and is not specifically limited here; for example, if the potential of the output end of the voltage detection circuit 20 is within -1V~1V, the potential of the output end of the voltage detection circuit 20 is considered to be approximately equal to zero.

[0108] In this embodiment, by adding a second controllable switch 23, the high-voltage interlock detection device 100 has the function of detecting ground short-circuit faults and power short-circuit faults, thereby making the detection results of the high-voltage detection device more reliable, and further making the system in which the high-voltage detection device is located more stable and reliable.

[0109] This embodiment also provides another specific implementation of the voltage detection circuit 20, and each voltage detection circuit 20 can adopt this implementation; the specific structure of this implementation can be found in Figure 5 20, this embodiment, based on the above embodiment, further includes: at least one second voltage dividing branch 25.

[0110] All the second voltage-dividing branches 25 and the branch formed by the second controllable switch 23 are connected in series, and one end of the formed series branch is connected to: the detection end corresponding to the voltage detection circuit 20 on the high-voltage interlock detection circuit 10, and the other end of the formed series branch is connected to the output end of the first power supply 24.

[0111] by Figure 5 Taking 20 in FIG. 1 as an example, the preset potential is equal to the output voltage of the first power supply 24×R1÷(2R1+R2).

[0112] The second voltage divider branch 25 includes at least one resistor. If the number of resistors is greater than 1, all resistors are connected in series, and the two ends of the series branch formed serve as the two ends of the second voltage divider branch 25. If the number of resistors is equal to 1, the two ends of the resistor serve as the two ends of the second voltage divider branch 25. For example, Figure 5 As shown in R2.

[0113] The above are only three implementations of the voltage detection circuit 20. In practical applications, including but not limited to these, no specific limitations are made here and it can be determined according to specific circumstances. All of them are within the scope of protection of this application.

[0114] Another embodiment of the present application provides an implementation of a high voltage interlock detection circuit 10. The specific structure of the circuit can be found in Figure 6 The circuit 10 specifically includes: at least one third controllable switch 11 and at least one third voltage dividing branch 12 .

[0115] In a specific example, all third controllable switches 11 and all third voltage dividing branches 12 are connected in series on a path between any detection terminal of the high-voltage interlock detection circuit 10 and any pole of the second power supply 13 .

[0116] Specifically, it can be: all the third controllable switches 11 and all the third voltage-dividing branches 12 are connected in series on the path between one detection terminal of the high-voltage interlock detection circuit 10 and the positive pole of the second power supply 13; it can also be: all the third controllable switches 11 and all the third voltage-dividing branches 12 are connected in series on the path between the other detection terminal of the high-voltage interlock detection circuit 10 and the negative pole of the second power supply 13.

[0117] In another specific example, at least one third voltage dividing branch 11 and / or at least one third controllable switch 12 are connected in series on the path between one detection terminal of the high-voltage interlock detection circuit 10 and the positive pole of the second power supply 13; at least one third voltage dividing branch 11 and / or at least one third controllable switch 12 are connected in series on the path between the other detection terminal of the high-voltage interlock detection circuit 10 and the negative pole of the second power supply 13.

[0118] For example, Figure 6For example, the high-voltage interlock detection circuit 10 includes two third controllable switches 11 and two third voltage-dividing branches 12, one end of the upper third voltage-dividing branch 12 is connected to the detection terminal A of the high-voltage interlock detection circuit 10, and the other end of the upper third voltage-dividing branch 12 is connected to the positive pole of the second power supply 13 through a third controllable switch 11; one end of the lower third voltage-dividing branch 12 is connected to the negative pole of the second power supply 13, and the other end of the lower third voltage-dividing branch 12 is connected to the detection terminal B of the high-voltage interlock detection circuit 10.

[0119] The above two examples only illustrate two connection methods of the third controllable switch 11 and the third voltage dividing branch 12 , which are not specifically limited here and can be determined according to specific circumstances, and are all within the scope of protection of this application.

[0120] The target end of any of the third voltage-dividing branches 12 is used as the output end of the high-voltage interlock detection circuit 10 and is connected to the corresponding receiving end of the controller 200; wherein the target end is an end of the third voltage-dividing branch 12 that is directly or indirectly connected to the detection end of the high-voltage interlock detection circuit 10; for example, Figure 6 For example, the target end is the right end of the third voltage dividing branch 12 located at the bottom, that is, the right end of the third voltage dividing branch 12 located at the bottom is used as the output end of the high-voltage interlock detection circuit 10; for another example, Figure 7 For example, the target end is the right end of the third voltage dividing branch 12 located on the upper side, that is, the right end of the third voltage dividing branch 12 located on the upper side serves as the output end of the high-voltage interlock detection circuit 10.

[0121] The control end of each third controllable switch 11 is connected, and the connection point serves as the control end of the high-voltage interlock detection circuit 10, and is connected to: the controller 200 and its corresponding output end, that is, when the high-voltage interlock detection circuit 10 receives the fourth detection signal or the first detection signal, each third controllable switch 11 receives the fourth detection signal or the first detection signal.

[0122] When each third controllable switch 11 receives the fourth detection signal, each third controllable switch 11 is turned on.

[0123] When each third controllable switch 11 is turned on, if the interlock terminal 04 on the high-voltage plug 01 in the high-voltage connector 300 is not plugged into the corresponding terminal on the high-voltage socket 05, the circuit between the two poles of the second power supply 13 is in an open circuit state, so that the potential of the output end of the high-voltage interlock detection circuit 10 is approximately equal to the potential of one pole of the second power supply 13. If the interlock terminal 04 on the high-voltage plug 01 in the high-voltage connector is plugged into the corresponding terminal on the high-voltage socket 05, the circuit between the two poles of the second power supply 13 is in a closed state, so that the potential of the output end of the high-voltage interlock detection circuit 10 is not equal to the potential of that pole of the second power supply 13.

[0124] It should be noted that if the potential of the output end of the high-voltage interlock detection circuit 10 is within a third preset range of the potential of one pole of the second power supply 13, it is considered that the potential of the output end of the high-voltage interlock detection circuit 10 is approximately equal to the potential of the pole of the second power supply 13; in actual applications, the third preset range is set according to actual conditions and is not specifically limited here; for example, assuming that the negative pole potential of the second power supply 13 is zero, if the potential of the output end of the high-voltage interlock detection circuit 10 is within -1V~1V, it is considered that the potential of the output end of the high-voltage interlock detection circuit 10 is approximately equal to the negative pole potential of the second power supply 13.

[0125] For example, Figure 6 For example, when each third controllable switch 11 is turned on, if the interlock terminal 04 on the high-voltage plug 01 in the high-voltage connector is not plugged into the corresponding terminal on the high-voltage socket 05, the circuit between the two poles of the second power supply 13 is in an open circuit state, so that the potential of the output end of the high-voltage interlock detection circuit 10 is approximately equal to the negative electrode potential of the second power supply 13; normally, the negative electrode of the second power supply 13 is grounded, so the potential of the output end of the high-voltage interlock detection circuit 10 is approximately equal to zero.

[0126] For example, Figure 7 For example, when each third controllable switch 11 is turned on, if the interlocking terminal 04 on the high-voltage plug 01 in the high-voltage connector 300 is not plugged into the corresponding terminal on the high-voltage socket 05, the circuit between the two poles of the second power supply 13 is in an open circuit state, so that the potential of the output end of the high-voltage interlock detection circuit 10 is approximately equal to the positive electrode potential of the second power supply 13; normally, the negative electrode of the second power supply 13 is grounded, so the potential of the output end of the high-voltage interlock detection circuit 10 is approximately equal to the output voltage of the second power supply 13.

[0127] It can be seen from this that if the potential of the output end of the high-voltage interlock detection circuit 10 is approximately equal to the potential of one pole of the second power supply 13, the controller 200 determines that the interlock terminal 04 on the high-voltage plug 01 in the high-voltage connector and the corresponding terminal on the high-voltage socket 05 are not plugged in; if the potential of the output end of the high-voltage interlock detection circuit 10 is not equal to the potential of the pole of the second power supply 13, the controller 200 determines that the interlock terminal 04 on the high-voltage plug 01 in the high-voltage connector and the corresponding terminal on the high-voltage socket 05 are plugged in.

[0128] This embodiment also provides another implementation of the high voltage interlock detection circuit 10, the specific structure of which can be found in Figure 8 10, this embodiment, based on the above embodiment, further includes: at least one anti-reverse branch 14.

[0129] At least one anti-reverse branch 14 is connected in series on the path between one detection end of the high-voltage interlock detection circuit 10 and the positive pole of the second power supply 13, and / or, at least one anti-reverse branch 14 is connected in series on the path between the other detection end of the high-voltage interlock detection circuit 10 and the negative pole of the second power supply 13; the conduction direction of each anti-reverse branch 14 is the same as the current direction allowed on the path where it is located.

[0130] For example, Figure 8 For example, the detection terminal A of the high-voltage interlock detection circuit 10 is connected to the cathode of the anti-reverse branch 14, and the anode of the anti-reverse branch 14 is connected to the positive electrode of the second power supply 13 through a third controllable switch 11.

[0131] Optionally, the anti-reverse branch 14 can be a diode branch. In practical applications, this includes but is not limited to this. No specific limitation is made here and it can be determined according to the circumstances. All of these are within the scope of protection of this application.

[0132] Wherein, the diode branch includes at least one diode. If the number of diodes is greater than 1, all diodes are connected in series in the same direction, and the anode of the series branch formed serves as the anode of the diode branch, and the cathode of the series branch formed serves as the cathode of the diode branch; if the number of diodes is equal to 1, the anode of the diode serves as the anode of the diode branch, and the cathode of the diode serves as the cathode of the diode branch. For example, Figure 8 As shown in Z.

[0133] Since a voltage is applied between the two ends of the interlock terminal in the high-voltage connector 300 when high-voltage interlock detection is performed on other sides, this embodiment reduces the possibility of this voltage causing the output voltage of the second power supply 13 to change by adding the anti-reverse branch 14.

[0134] The above are only two implementations of the high-voltage interlock detection circuit 10. In practical applications, including but not limited to these, no specific limitations are made here and the specific circumstances may be determined, all of which are within the scope of protection of this application.

[0135] Another embodiment of the present application provides an electric energy distribution unit, the specific structure of which can be found in Figure 9 , specifically including: a first controller 210 and a high-voltage interlock detection device 100 as provided in the above embodiment; the connection relationship between the two has been described in detail above and will not be repeated here.

[0136] Another embodiment of the present application provides a vehicle control unit, the specific structure of which can be found in Figure 9 , specifically including: a second controller 220 and the high-voltage interlock detection device 100 provided in the above embodiment; the connection relationship between the two has been described in detail above and will not be repeated here.

[0137] Another embodiment of the present application provides a vehicle, the specific structure of which can be seen in Figure 11 , which specifically includes: the power distribution unit 400 provided in the above embodiment of the present application, and / or, the vehicle control unit 500 provided in the above embodiment of the present application; the connection relationship between the two has been described in detail above and will not be repeated here; for example, Figure 11 As shown, the vehicle specifically includes an electric energy distribution unit 400 and a vehicle control unit 500.

[0138] For the above description of the disclosed embodiments, the features recorded in each embodiment in this specification can be replaced or combined with each other, so that professional and technical personnel in this field can implement or use this application. The above description is only a preferred embodiment of the present utility model, and does not limit the present utility model in any form. Although the present utility model has been disclosed as above with a preferred embodiment, it is not used to limit the present utility model. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the present utility model using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still falls within the scope of protection of the technical solution of the present utility model.

Claims

1. A high voltage interlock detection device, characterized in that: include: High voltage interlock detection circuit and two voltage detection circuits; wherein: The two detection ends of the high-voltage interlock detection circuit serve as the two detection ends of the high-voltage interlock detection device, and are respectively connected to the two ends of the interlock terminal in the high-voltage connector; The two acquisition terminals of the voltage detection circuit are respectively connected to the two detection terminals of the high-voltage interlock detection circuit; The controller outputs a first detection signal to the high-voltage interlock detection circuit and a second detection signal to both of the voltage detection circuits; the first detection signal is a signal that prohibits the high-voltage interlock detection circuit from performing high-voltage interlock detection, and each second detection signal is a signal that enables the voltage detection circuit receiving the signal to perform voltage detection normally; At least one of the voltage detection circuits outputs a target detection result to the controller, and the controller outputs the first detection signal to the high-voltage interlock detection circuit; each of the target detection results indicates that the potential of the acquisition end of the voltage detection circuit outputting itself is not equal to zero.

2. The high-voltage interlock detection device according to claim 1, characterized in that: The voltage detection circuit includes: a first controllable switch and at least two first voltage dividing branches; wherein: The first controllable switch and all the first voltage-dividing branches are connected in series, one end of the series branch is connected to: the detection end corresponding to the voltage detection circuit on the high-voltage interlock detection circuit, and the other end of the series branch is grounded; The connection point of any two of the first voltage-dividing branches serves as the output end of the voltage detection circuit; The control end of the first controllable switch serves as the control end of the voltage detection circuit.

3. The high-voltage interlock detection device according to claim 2, characterized in that: The voltage detection circuit further includes: a second controllable switch; wherein: One end of the second controllable switch is connected to: a detection end on the high-voltage interlock detection circuit corresponding to the voltage detection circuit, and the other end of the second controllable switch is connected to the output end of the first power supply; The control end of the second controllable switch is connected to the output end corresponding to the controller.

4. The high-voltage interlock detection device according to claim 3, characterized in that: The voltage detection circuit further includes: at least one second voltage dividing branch; wherein: All the second voltage-dividing branches and the branch formed by the second controllable switch are connected in series, and one end of the formed series branch is connected to: the detection end corresponding to the voltage detection circuit on the high-voltage interlock detection circuit, and the other end of the formed series branch is connected to the output end of the first power supply.

5. The high-voltage interlock detection device according to any one of claims 1 to 3, characterized in that: The high-voltage interlock detection circuit includes: at least one third controllable switch and at least one third voltage dividing branch; wherein: All of the third controllable switches and all of the third voltage dividing branches are connected in series on a path between any detection terminal of the high-voltage interlock detection circuit and any pole of the second power supply; The target end of any one of the third voltage-dividing branches serves as the output end of the high-voltage interlock detection circuit; The target end is an end of the third voltage dividing branch that is directly or indirectly connected to the detection end of the high-voltage interlock detection circuit; The control end of each of the third controllable switches is connected to the output end corresponding to the third controllable switch on the controller.

6. The high-voltage interlock detection device according to claim 5, characterized in that: The high-voltage interlock detection circuit further includes: at least one anti-reverse branch; wherein: At least one anti-reverse branch is connected in series on a path between a detection terminal of the high-voltage interlock detection circuit and the positive electrode of the second power supply; and / or, At least one anti-reverse branch is connected in series on a path between the other detection terminal of the high-voltage interlock detection circuit and the negative electrode of the second power supply; The conduction direction of each anti-reverse branch is the same as the current direction allowed on the path where the branch is located.

7. The high-voltage interlock detection device according to claim 6, characterized in that: The anti-reverse branch is a diode branch.

8. The high-voltage interlock detection device according to any one of claims 1 to 3, characterized in that: The high-voltage interlock detection circuit includes: at least one third controllable switch and at least one third voltage dividing branch; wherein: At least one third voltage dividing branch and / or at least one third controllable switch are connected in series on a path between a detection terminal of the high-voltage interlock detection circuit and the positive electrode of the second power supply; At least one third voltage dividing branch and / or at least one third controllable switch are connected in series on a path between the other detection terminal of the high-voltage interlock detection circuit and the negative electrode of the second power supply; The target end of any one of the third voltage-dividing branches serves as the output end of the high-voltage interlock detection circuit; The target end is an end of the third voltage dividing branch that is directly or indirectly connected to the detection end of the high-voltage interlock detection circuit; The control end of each of the third controllable switches is connected to the output end corresponding to the third controllable switch on the controller.

9. An electric energy distribution unit, characterized in that: include: A first controller and a high-voltage interlock detection device according to any one of claims 1 to 8.

10. A vehicle control unit, characterized in that: include: A second controller and a high-voltage interlock detection device according to any one of claims 1 to 8.

11. A vehicle, characterized in that: include: The power distribution unit as claimed in claim 9, and / or the vehicle control unit as claimed in claim 10.

Images